ALTERNATIVES FOR PRISONS 221 their time in an inclosed institution, an opportunity for periodic work in the open air. The inclosed prisons, with the exception of those reserved for the "isolation" of class enemies while they are awaiting disposition by the-courts, or for tem- porary detention of other categories of prisoners, have been very widely converted into factories. The industrialization of Soviet prisons is guided by what the Kremlin terms its "revolutionary utilitarianism-" In other words the man in prison is made to serve the state's programme fully as much as the man on the outside. The industries developed in the prisons have been harnessed to the five year plans to the same degree that all other industries are. Thus the 3000 inmates of the Lianozovo-Kriukovsk factory-prison on the outskirts of Moscow, in a single summer produced 30,000,000 bricks which the govern- ment utilized in its vast construction projects. Pris- oners with any sort of industrial or mechanical training are required to perfect themselves in their special occupation under competent instructors, They are then organized into "artels'* or gangs and sent away to work hundreds and sometimes thousands of miles distant from their original place of detention. They live in open-air camps in the summer and in hastily constructed barracks in the winter. It is from among this class of prisoners that the government recruits large portions of its section hands, of its bridge and road builders, of its lumber workers, the